9 (8). Male genitalia: Sperm pump with enlarged, bowl- 
shaped base (figs. 509, 514); distiphallus (fig. 
516) frequently with numerous spinules (subgenus 
Cephalomyza ) ; halter often black (see p. 79 for 
other characters) Amauromyza Hendel (p. 78) 
Ma l e genitalia: Sperm pump without such enlarged 
base; distiphallus never with spinules 10 
10 (9). 3d antennal segment with spine (fig. 549), scutel- 
lum with only 1 pair of bristles; or lunule con- 
spicuously higher than a semicircle, either 
narrow (fig. 540, A) or triangular (fig. 540, B) ; 
or lunule conspicuously large and broad (fig. 540, 
C ) , antennal bases widely separated, and 3d anten- 
nal segment in male normally greatly enlarged 
(fig. 593) Cerodontha Rondani (p. 87) 
— Not so 
11 (10). Foretibia with lateral bristle; abdomen in male con- 
spicuously yellow Nemorimyza Frey (p. 87) 
Only midtibia sometimes with lateral bristle, 
foretibia never 22 
12 (11). No presutural dc; epandrium with conspicuous patch 
of spines at hindcorner (fig. 898) 
Calycomyza Hendel (p. 140) 
Presutural dc present; epandrium without such spines 
23 
13 (12). Stridulating mechanism present in male (figs. 621, 
622) ; frons and scutellum characteristically 
bright yellow (black only in L. nigriscutellata 
and Ij. nigrissima ) ; humerus usually yellow with 
more or less black spot Liriomyza Mik (p. 107) 
Stridulating mechanism lacking; frons and scutel- 
lum variable from black to yellow 14 
14 (13). Scutellum largely black, at most faintly yellow 
between basal scutellars Galiomyza Spencer (p. 136) 
Scutellum yellow or at most gray 15 
15 (14). 1 upper orbital bristle (ors); male genitalia with 
aedeagus weakly developed (fig. 868) 
Haplopeodes Steyskal (p . 138) 
2 ors; male genitalia with aedeagus strongly de- 
veloped (figs. 1025, 1042) 16 
16 (15). Orbit broad, raised above frons; orbital setulae 
reclinate Metopomyza Enderlein (p. 161) 
Orbit largely in plane of frons; orbital setulae 
upright, slightly proclinate, or absent 
Phytoliriomyza Hendel (p. 15 1 ) ( in part) 
17 (8). 2d costal section at least twice length of 4th 
(fig. 1039); outer crossvein either absent, or if 
present, well beyond 1st section 
Paraphytomyza Enderlein (p. 162) 
Second costal section conspicuously short, less 
than 1.5 times length of 4th (fig. 1052); outer 
crossvein basal to 1st section 
Pseudonapomyza Hendel (p. 166) 
18 (6). Costa extending to vein R 4+5 19 
Costa extending to vein M 1+2; orbital setulae con- 
16 
